Finding the Fourth Proportional to 142,704.83, 196,931.79 and 78,174.70

Step by Step Solution

1. Step 1: Write the proportion equation
   142,704.83 : 196,931.79 = 78,174.70 : x
2. Step 2: Convert to fraction form
   142,704.83/196,931.79 = 78,174.70/x
3. Step 3: Cross multiply
   142,704.83x = 196,931.79 × 78,174.70
4. Step 4: Simplify right side
   142,704.83x = 15,395,083,111.38
5. Step 5: Solve for x
   x = 15,395,083,111.38/142,704.83
6. Step 6: Final answer
   x = 107,880.60